Heat exchanger fin



FIG. 1 is a front perspective view of the heat exchanger fin shown as a section because the pattern repeats;

FIG. 2 is a left end view of the heat exchanger fin of FIG. 1;

FIG. 3 is a right end view of the heat exchanger fin of FIG. 1;

FIG. 4 is a front side view of the heat exchanger fin of FIG. 1;

FIG. 5 is a backside view of the heat exchanger fin of FIG. 1;

FIG. 6 is a top view of the heat exchanger fin of FIG. 1; and,

FIG. 7 is a bottom view of the heat exchanger fin of FIG. 1.

The broken lines depict boundaries of the heat exchanger fin and form no part of the claim. 

CLAIM The ornamental design for a “heat exchanger fin,” as shown and described. 